oInstable cardiac disease: symptomatic heart failure, symptomatic coronary artery disease, ventricular cardiac arrhythmia not well controlled with medication, myocardial infarction or resuscitation within 6 month before study oActive infection necessitating systemic therapy or uncontrolled infection oInterstitial lung diseases (for example: pneumonitis or fibrosis of the lung) and indication for interstitial lung disease in chest x-ray or CT-scan respectively oActive inflammatory bowel disease or other bowel diseases which provoke chronic diarrhea (defined as > 4 bowel movements per day) oNeurological or psychiatric disease including dementia, epilepsy or untreated, symptomatic brain metastases oLimited hearing ability